Concept
Stromatolithe
Concepts associés (23)
Mésoprotérozoïque
The Mesoproterozoic Era is a geologic era that occurred from . The Mesoproterozoic was the first era of Earth's history for which a fairly definitive geological record survives. Continents existed during the preceding era (the Paleoproterozoic), but little is known about them. The continental masses of the Mesoproterozoic were more or less the same ones that exist today, although their arrangement on the Earth's surface was different.
Craton de Pilbara
vignette|Carte d'Australie. La région de Pilbara est en rouge. Le craton de Pilbara est une partie ancienne et stable de la lithosphère continentale située dans la région de Pilbara en Australie-Occidentale. vignette|Reconstitution d’un paysage archéen. Avec le craton du Kaapvaal en Afrique du Sud, le craton de Pilbara est l'une des deux seules croûtes continentales archéennes préservées, datant du Paléoarchéen et du Mésoarchéen soit . Les deux cratons ont probablement fait partie du supercontinent Vaalbara ou de celui d'Ur.
Macrofossil
Macrofossils, also known as megafossils, are preserved organic remains large enough to be visible without a microscope. The term macrofossil stands in opposition to the term microfossil. Microfossils, by contrast, require substantial magnification for evaluation by fossil-hunters or professional paleontologists. As a result, most fossils observed in the field and most "museum-quality" specimens are macrofossils. Plant macrofossils include leaf, needle, cone, and stem debris; and can be used to identify types of plants formerly growing in the area.